Buggy code:
public class ModifiedSelectorTest extends BaseSelectorTest { private static final FileUtils FILE_UTILS = FileUtils . getFileUtils ( ) ; private static String pkg = "org.apache.tools.ant.types.selectors.modifiedselector" ; private Path testclasses = null ; public ModifiedSelectorTest ( String name ) { } public BaseSelector getInstance ( ) { } public void setUp ( ) { } public void testValidateWrongCache ( ) { } public void testValidateWrongAlgorithm ( ) { } public void testValidateWrongComparator ( ) { } public void testIllegalCustomAlgorithm ( ) { } public void testNonExistentCustomAlgorithm ( ) { } public void testCustomAlgorithm ( ) { } public void testCustomAlgorithm2 ( ) { } public void testCustomClasses ( ) { } public void testDelayUpdateTaskFinished ( ) { } public void testDelayUpdateTargetFinished ( ) { } public void testDelayUpdateBuildFinished ( ) { } public void doDelayUpdateTest ( int kind ) { } private String getAlgoName ( String classname ) { } public void testPropcacheInvalid ( ) { } public void testPropertyfileCache ( ) { } public void testCreatePropertiesCacheDirect ( ) { } public void testCreatePropertiesCacheViaModifiedSelector ( ) { } public void testCreatePropertiesCacheViaCustomSelector ( ) { <START_BUG> File cachefile = ModifiedSelectorTest . FILE_UTILS . createTempFile ( "tmp-cache-" , ".properties" , null ) ; <END_BUG> try { makeBed ( ) ; ExtendSelector s = new ExtendSelector ( ) ; s . setClassname ( "org.apache.tools.ant.types.selectors.modifiedselector.ModifiedSelector" ) ; s . addParam ( createParam ( "update" , "true" ) ) ; s . addParam ( createParam ( "cache.cachefile" , cachefile . getAbsolutePath ( ) ) ) ; s . addParam ( createParam ( "cache" , "propertyfile" ) ) ; String results = selectionString ( s ) ; assertTrue ( "Cache<seq2seq4repair_space>file<seq2seq4repair_space>is<seq2seq4repair_space>not<seq2seq4repair_space>created." , cachefile . exists ( ) ) ; } finally { cleanupBed ( ) ; if ( cachefile != null ) cachefile . delete ( ) ; } } public void _testCustomCache ( ) { } protected void doTest ( Cache cache ) { } public void testHashvalueAlgorithm ( ) { } public void testDigestAlgorithmMD5 ( ) { } public void testDigestAlgorithmSHA ( ) { } public void testChecksumAlgorithm ( ) { } public void testChecksumAlgorithmCRC ( ) { } public void testChecksumAlgorithmAdler ( ) { } protected void doTest ( Algorithm algo ) { } public void testEqualComparator ( ) { } public void testRuleComparator ( ) { } public void testEqualComparatorViaSelector ( ) { } public void _testRuleComparatorViaSelector ( ) { } public void _testCustomComparator ( ) { } public void testResourceSelectorSimple ( ) { } public void testResourceSelectorSelresTrue ( ) { } public void testResourceSelectorSelresFalse ( ) { } public void testResourceSelectorScenarioSimple ( ) { } protected void doTest ( Comparator comp ) { } public void testSeldirs ( ) { } public void testScenario1 ( ) { } public void _testScenario2 ( ) { } public void testScenarioCoreSelectorDefaults ( ) { } public void testScenarioCoreSelectorSettings ( ) { } public void testScenarioCustomSelectorSettings ( ) { } public void doScenarioTest ( String target , String cachefilename ) { } private Parameter createParam ( String name , String value ) { } private class BFT extends org . apache . tools . ant . BuildFileTest { String buildfile = "src//etc//testcases//types//selectors.xml" ; BFT ( ) { } BFT ( String name ) { } String propfile = "ModifiedSelectorTest.properties" ; boolean isConfigured = false ; public void setUp ( ) { } public void tearDown ( ) { } public void doTarget ( String target ) { } public String getProperty ( String property ) { } public void writeProperties ( String line ) { } public void deletePropertiesfile ( ) { } public void deleteCachefile ( ) { } public String getBuildfile ( ) { } public void setBuildfile ( String buildfile ) { } } private class MockProject extends Project { private Task task ; private Target target ; public MockProject ( ) { } public void fireBuildFinished ( ) { } public void fireSubBuildFinished ( ) { } public void fireTargetStarted ( ) { } public void fireTargetFinished ( ) { } public void fireTaskStarted ( ) { } public void fireTaskFinished ( ) { } } }

Fix:
File cachefile = ModifiedSelectorTest . FILE_UTILS . createTempFileName ( "tmp-cache-" , ".properties" , null , false ) ;